Wild avalanches and mild fluctuations during filiform corrosion of Mg in NaCl solution

Tan, Wei; Gou, Boyuan; Ding, Xiangdong; Sun, Jun; Salje, Ekhard K. H.

doi:10.1103/physrevresearch.5.033219

Cited by 3 publications

(2 citation statements)

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“…Their two different fingerprints relate to random, independent events in the peak-regime at low energies and have correlated collapse by networks of cracks in the power-law regime [ 19 , 34 – 37 ]. The boundary between the two regimes is referred to as the crossover point and separates the conditions where strain release occurs in a correlated manner (wild) and the low-energy regime where events are local and uncorrelated (mild) [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

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Acoustic emission of kidney stones: a medical adaptation of statistical breakdown mechanisms

Eckstein,

Wiseman,

Carpenter

et al. 2024

Urolithiasis

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Kidney stones have a prevalence rate of > 10% in some countries. There has been a significant increase in surgery to treat kidney stones over the last 10 years, and it is crucial that such techniques are as effective as possible, while limiting complications. A selection of kidney stones with different chemical and structural properties were subjected to compression. Under compression, they emit acoustic signals called crackling noise. The variability of the crackling noise was surprisingly great comparing weddellite, cystine and uric acid stones. Two types of signals were found in all stones. At high energies of the emitted sound waves, we found avalanche behaviour, while all stones also showed signals of local, uncorrelated collapse. These two types of events are called ‘wild’ for avalanches and ‘mild’ for uncorrelated events. The key observation is that the crossover from mild to wild collapse events differs greatly between different stones. Weddellite showed brittle collapse, extremely low crossover energies (< 5 aJ) and wild avalanches over 6 orders of magnitude. In cystine and uric acid stones, the collapse was more complicated with a dominance of local “mild” breakings, although they all contained some stress-induced collective avalanches. Cystine stones had high crossover energies, typically $$\sim$$ ∼ 750 aJ, and a narrow window over which they showed wild avalanches. Uric acid stones gave moderate values of crossover energies, $$\sim$$ ∼ 200 aJ, and wild avalanche behaviour for $$\sim$$ ∼ 3 orders of magnitude. Further research extended to all stone types, and measurement of stone responses to different lithotripsy strategies, will assist in optimisation of settings of the laser and other lithotripsy devices to insight fragmentation by targeting the ‘wild’ avalanche regime.

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Section: Resultsmentioning

confidence: 99%

“…Such ‘hard’ materials break by extended avalanches and complex crack patterns. Mild events are local and do not induce extended cracks in the same stones in response to wide ranging elastic forces [ 22 , 30 , 38 , 58 ].…”

Section: Discussionmentioning

confidence: 99%